Malicious PDF — malware analysis report

Static analysis result for SHA-256 084f4b0672cdcef5…

MALICIOUS

PDF

40.5 KB Created: 2020-10-31 00:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a63e5d0be50b9f7144612d0750340ce9 SHA-1: 306ed63ea718ed439ffc5c6050c1d5e5212f3d0d SHA-256: 084f4b0672cdcef5294850c7635766f29607a82079e193bcdaf48718033cb110
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?keyword=the+sims+deluxe+edition+steam In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5f8d92cdd04d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5f9a76631075e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_5f9b83e8770f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f9348c48ec4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5f8ca50d47583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f9080aa98ad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_5f8f63171df17.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005dc1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005dc1.bin)
    • https://s3.amazonaws.com/leguvefu/88848988523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3549/8949/files/is_the_iphone_8_plus_speaker_waterproof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9502/3509/files/83481625529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/girl_scout_cookies_color_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/77692274699.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/ectomorph_workout_routine_and_diet.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00005dc1.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC1 4984 bytes
SHA-256: 6de3f19f4b223c453a2a5191640423286e0673c15c488ec355f70b0233806e9f
font_01_sfnt_off00006e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8C 11456 bytes
SHA-256: 43a86509a661aa5e03714a067fe2bdcb565ec1d8572a6c454fe0ee5097293069